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Acer Aspire 4520 display off suddenly without warning

I bought Aspire 2 months ago.The display will be off suddenly,with out warning. Some time even the PC doesnt boot up.So I tried Remove the battery and start it on AC power,it seems to be working fine. But the problem occurs when I try restart it on the next morning. The display was off,even before I log in to my PC. Please help me, I m not able to understand whether this is a battery problem or some technical issue in the PC itself

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  • siemech82 Dec 05, 2007

    I'm having the exact same issue. I have the laptop plugged in WITH the battery in as well. I just bought this a couple days ago. It's running Vista Home Premium 32 bit. I really can't say what is causing this. It happens randomly. Also, occasionally, it will show a gray screen with diaganol lines. When gray lines appear, the laptop still seems to be running things in the background. Close the laptop, open it back up and it's fine. When the screen turns off, right before, everything locks up then screen shuts off. Laptop still has power as if it is on. Please Help!!!! I emptied my bank account for this as a gift for my fiancee. I only have a couple days left to return it if I should. Thanks in advance!!!

  • herry165 Dec 06, 2007

    1. my acer aspire 4520: memory 2 Gb of Ram
    2 VGA memory share 64 Mb. ( Make Turn off Suddenly, I Guess)
    3. Change VGA memory share to 128 or 256 Mb ( The Problem Is Gone )

  • siemech82 Dec 06, 2007

    How do I change the VGA memory share????

  • siemech82 Dec 06, 2007

    Actually, just checked it. It's already using 256 MB VGA share

  • herry165 Dec 07, 2007

    1. While booting press F2 Button
    2. Entering Bios Setup Press Right Button on keyboard.
    3. You Will see Nvdia Share Memory : 64,128,256
    if you choose 64, vga memory share on windows XP/Vista become 256Mb.
    if you Choose 128 or 256, vga memory share on windows Xp/vista become 512 Mb
    4. ESC, then Save Change. then reboot.
    I am Using 2 Gb Ram. when vga share 256 MB , shut down suddenly and sometimes my screen goes frezze. With 512 Mb My problem is gone.

  • siemech82 Dec 07, 2007

    Well, it was already set to 256 so I changed it to 128. Problem still occurred. I actually just took the laptop back and exchanged it for a new one so we'll see what happens. I REALLY hope I just had a faulty one.

  • herry165 Dec 09, 2007

    I have Intresting Probem, when run this program "

    OCZ SPD-Z (SPD memory flash tool)
    " (freeware)

    My acer aspire 4520 turn off without warning, Can't Boot up. I have to unplug AC adaptor and Battery then plug in them again, aspire 4520 bootup normaly.

    how to fix this problem?


  • aizhen Jan 24, 2009

    I m using Acer Aspire 4520 too. I have this display problem since a month ago and I just bought it last May. Totally no display when I on my laptop and the power button still lit on. Sometimes totally can't s ? boot up, sometimes i can hear the sound of Window starts but no display at all.

    Sent to service center last week, said updated bios, but problem remains. Wonder if everyone using this model having problem with the display always?



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Well, I'm only a few days into my new machine but as far as I can tell so far everything is great. It looks like the ultimate solution is to return it and get another one.

Posted on Dec 09, 2007

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Please clarify this sequence of events: "on AC power,it seems to be working fine. But the problem occurs when I try restart it on the next morning"... was it restarted next morning on AC power or battery...which one?

Posted on Aug 26, 2007

  • Marty marty Sep 03, 2007

    do you still need help with this?


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M having this exact problem you mentioned - my acer aspire 4520 would also just turn off by itself without warning. i usually remove the battery, put it back in and check with the charger. usually it doesnt boot up either, i have to guess or tinker around with the battery or charger, time consuming and very very inconvenient. its very frustrating, i don't know what to do as well. but if you're having this kind of problem, then i think acer should investigate on this as well.



Posted on Oct 21, 2007

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Ok I Will wait your post with your new Aspire 4520.

Posted on Dec 09, 2007

  • herry165 Dec 11, 2007

    Ok. I went to Acer Servis Center. The Technician told me if your 4520 use bios version under 3619 the problem may apear.

    But my 4520 use bios ver 3620.

    The problem disapear. when I shut down program called "RightMark CPU clock utillity" . if I run that program with "Sisoftware sandra Profesinal XI SP4", "PC Wizard 2008", "Dr. Hardware 2007", or other diagnostic program, the problem apear again.

    I Hope your new machine running Well.


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